package StringSecond.SwordOffer.StringSecond;

public class ReverString {
    /**
     * 反转字符串
     * 编写一个函数，其作用是将输入的字符串反转过来。输入字符串以字符数组 s 的形式给出。
     *
     * 不要给另外的数组分配额外的空间，你必须原地修改输入数组、使用 O(1) 的额外空间解决这一问题。
     * 示例 1：
     *
     * 输入：s = ["h","e","l","l","o"]
     * 输出：["o","l","l","e","h"]
     * 示例 2：
     *
     * 输入：s = ["H","a","n","n","a","h"]
     * 输出：["h","a","n","n","a","H"]

     * @param s
     */
    public static void reverseString(char[] s) {
        int i = 0;
        int j = s.length - 1;
        while (i < j) {
            char temp = s[i];
            s[i] = s[j];
            s[j] = temp;
            i++;
            j--;
        }
    }

    public static void main(String[] args) {
        char[] chars = {'a', 'b', 'c'};
        reverseString(chars);
        System.out.println(chars);
    }
}
